The Spiritual Center, sometimes referred to as the Retreat House, located near Maria Stein in rural Mercer County, Ohio about eight miles south of Grand Lake St. Marys. We hope you find the Spiritual Center to be a place where you can take time to reflect on your life in peace and quiet at our surroundings. Let this be your home away from home. Please feel free to utilize all that our facility has to offer. We hope to serve you in the future.